Assiffktob



`W. GRIKSCHEIT.

DRAIN PLUG,

APPLICATION FILED OCT. Z7, 19H).

ioI

WILLIAM GRIKSCHEIT, 0F DETROIT, MICHIGAN, ASSIGNOR 0F TO THOMAS B.MOTHER/SELL, OF WINDSOR, ONTARIO, CANADA.

DRAIN PLUG.

Maaate.

Specieation of Letters Patent.' l Patentgd July 18; 1922; l-

Applilcation led 0ctober2`7, 1919. Serial No. 333,708.

To all whom t may concern Be it known that I, WILLIAM GRIKSCHEIT, acitizen of the United States of America, residing at Detroit, in thecounty of Wayne and State of Michigan, have invented certain new and4usefull Improvements in Drain Plugs, of Awhich the following is aspecifica-` f Figure 1 is a longitudinal section through one form ofplug Figure 2 is a same;

Figures 3, 4: and are similar views showinmodified constructions.

rain plugs are usually preferred to drain-cocks for use in -many placeswhere it is only occasionally necessary to drain thel .container andwhere it is 4deslred to prevent tampering or accidental opening. This isfor the reason that a plug requires a wrenchfor loosening or disengagingthe same,

whereas a drain cock provided with a handle can be opened `without the'Yuse of any tool. Also there are many places where a plug may beinserted, but where a drain cock would be inaccessible. ient to draw o aportion of the contents of the receptacle by removing the drain plug,

inasmuch as it is very diiicult to re-engage the plug while the liquidis flowing out. With the present invention the plug is of a constructionpermitting drainage without necessity of disengagement, so that any de--sired portion of the contents can be drawn .off without difficulty.

As shown in Figures Y1 and 2, A is the body of the plug whichl ispreferably machined from the hexagonal, or other polygonal stock, and isprovided with a threaded nipple B for engagement with the aperture ofthe container. This member also has -a straight bore C extending axiallytherei threaded to receive acorrespondingly threaded member F, alsopreferably formed 7bottomplan view of the,

It is inconvenfrom polygonal stock, leaving the head por- I tion G. Themember F is axially bored at H, but this bore is terminating so as toleave an imperforate inner end portion I, preferably of conical form andadapted to seat upon the shoulder E.' The portion of the member Fadjacent to the end I is reduced in diameter to leave an annularclearance space J surrounding the same, and one or more lateral-apertures K through the walls of the member F establish communicationbetween the bore H and' said annular clearance space J.

With the construction just described the polygonal portion of theAmember A will serve as a wrench hold for engaging and dis- Vengagingsaidv member, and in the same manner the polygonal head portion G of themember F forms a wrench hold, but one of slightly smaller diameter thanthat of the member'A. Thus the-portion G will not interfere with theengagement of the wrench, or other tool, with the portion A, but willpermit of independent turning of the member F.l Therefore, whenever itis desired to drain or partly drain the container in-` stead ofloosening the main member A, the member F isv turned through itspolygonal head G so as to withdrawthe portion I from the seat E, therebypermitting the liquid to flow through the passage C, annular passage J,apertures K and bore H dischargin from the lower end of the plug.

ith the constructions shown in Figures 3 and 4, the operation' is thesame, but provision is made for preventing complete disengagement of themember F. In Figure 3 this meanscomprises an inwardly-extending portionL of the member F which has the bore M extending from its outer end butterminating short ofthe imperforate portion I. The outer end of themember L engages a counterbore N and is flanged outward so as to engagea shoulder at the inner end of said counterbore before the member F isdisengaged from the member A. There are also provided one or morelateral apertures l? through the member L establishing communicationbetween the bore M and the annular chamber J when the member F iswithdrawn from its seat.

In Figure 4 instead of the inward extension L, the member F is providedwith a neck portion Q which is reduced in diameter and the member Ahasat its outer end a flange R turned inward into the groove' surroundingthe neck portion Q and adapted to en age a shoulder S at the inner endthereof. ith either of the constructions shown in Figures 3 and 4 themember F may be operated to withdraw the same from its seat, butcomplete disengagement from the member A is prevented.

In Figure 5 I have shown a construction which may be used as adrain-cock being provided with an operating handle. This construction issubstantially the samek -as shown in Figure l with the addition of ahandle T which is inserted through a transverse bore in the head memberG. This handle is of a diameter less than the bore I-I and thereforewill not materially restrict the flow of the liquid therethrough.

What I claim as my invention is:

l. A drain plug comprising two members, one having an axial passagetherethrough with an externallythreaded nipple at one end thereof and acounterbore at the opposite end internally threaded, forming an annularshoulder or valve seat at the inner end of said counterbore, the othermember having a portion externally threaded to engage said threadedcounterbore, being provided with an imperforate portion at its inner endfor engaging said valve seat and having an axial passage from its outerend to said imperforate portion -With rightangled ports oommunicatinwith said counterbore, and a flange at t e outer end of saidfirst-mentioned member engaging a groove in said second-mentioned memberfor limiting adjustment thereof and reventing disengagement andflattened sur aces upon the exterior of each of said members rovidinofmeans for the adjustment of eac 2. drain plug comprising two members,

one having an axial passage therethrough with an externally threadednipple at one end thereof and a counterbore at the opposite endinternally threaded, forming an annular shoulder or valve seat at theinner end of said counterbore, the other member havwith an externallythreaded nipple at one end thereof and a counterbore at the opposite endinternally threaded, forming 'an annular shoulder or v-alve seat at theinner end of said counterbore, the other member having a portionexternally threaded to engage said threaded counterbore, being providedwith an imperforate portion atits inner end for engaging said valve seatand having 'an axial passage from its outer end to said imperforateportion with a right angled port communicating with said counterbore andhexagonal surfaces upon each of said members for adjusting them.

4. A drain plug comprising two members, one having an axial passagetherethrough with an externally threaded nipple at one end thereof and acounterbore at the opposite end internally threaded, forming an annularshoulder or valve seat at the inner end of said counterbore, the othermember having a portion externally threaded to engage said threadedcounterbore, being provided with an imperforate portion at its inner endfor engaging said valve seat and having an axial passage from its outerend to said imperforate portion with a right angled port communicatingwith said counterbore, and shouldered surfaces upon each of said membersfor adjusting them.

In testimony whereof I aiiix my signature.

j 'wiLLIAM eRIKsCHEIT.

